Spiral fluted thread tap is the most commonly used one. Different helical angles are adopted according to different working conditions. The common spiral angles are right-handed 15 degrees and 42 degrees. Generally speaking, the larger the helix angle, the better the chip removal performance. It is suitable for blind hole processing. It is better not to use through hole processing.
1 Tapped to the bottom of blind hole
2 Cutting will not remain
3 Easy to eat in the bottom hole
4 Good machinability
The tap can be divided into straight groove tap, spiral groove tap, screw tap and extrusion tap according to its shape, and each has its own advantages.
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